Renesas M16C/6NK Manual Do Utilizador

Rev.1.10    Jul 01, 2005    page 171 of 318
REJ09B0124-0110

M16C/6N Group (M16C/6NK, M16C/6NM)

14. Serial I/O

This document is under development and its contents are subject to change.

Register

Bit

 Function

U2TB 

(1)

0 to 7

Set transmission data

U2RB 

(1)

0 to 7

Reception data can be read

OER,FER,PER,SUM Error flag

U2BRG

0 to 7

Set a transfer rate

U2MR

SMD2 to SMD0

Set to “101b”

CKDIR

Select the internal clock or external clock

STPS

Set to “0”

PRY

Set this bit to “1” for direct format or “0” for inverse format

PRYE

Set to “1”

IOPOL

Set to “0”

U2C0

CLK1, CLK0

Select the count source for the U2BRG register

CRS

Invalid because the CRD bit = 1

TXEPT

Transmit register empty flag

CRD

Set to “1”

NCH

Set to “0”

CKPOL

Set to “0”

UFORM

Set this bit to “0” for direct format or “1” for inverse format

U2C1

TE

Set this bit to “1” to enable transmission

TI

Transmit buffer empty flag

RE

Set this bit to “1” to enable reception

RI

Reception complete flag

U2IRS

Set to “1”

U2RRM

Set to “0”

U2LCH

Set this bit to “0” for direct format or “1” for inverse format

U2ERE

Set to “1”

U2SMR 

(1)

0 to 3

Set to “0”

U2SMR2

0 to 7

Set to “0”

U2SMR3

0 to 7

Set to “0”

U2SMR4

0 to 7

Set to “0”

NOTE:

1. Not all register bits are described above. Set those bits to “0” when writing to the registers in SIM mode.